Open AccessExperimental characterization of the transfer function for a Silver-dielectric superlens
Author(s) -
Ciaran P. Moore,
Richard J. Blaikie
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.006412
Subject(s) - superlens , optical transfer function , optics , materials science , spatial frequency , wavelength , dielectric , point spread function , characterization (materials science) , image resolution , optoelectronics , refractive index , physics
We describe a technique for experimentally determining the spatial-frequency modulation transfer function for near-field super-resolution imaging systems and present such a modulation transfer function for a 20|40|20 nm poly(vinyl alcohol)~(PVA)|Silver|PVA superlens exposed to 365 nm wavelength (i-line) radiation through a 50-nm thick tungsten mask. An extensive spectral characterization is achieved from only two exposures, with transmission coefficients determined for spatial frequencies as high as 13 µm-1, corresponding to λ / 4.75. The resulting transfer function is in good agreement with analytical models that incorporate the effects of mask-superlens interactions.